The divine life is tri-personal. It is the overflowing love with which the Father begets the Son and surrenders him his own being, while the Son embraces this being and surrenders it back to the Father, the love in which Father and Son are One, which they breathe out together as their Spirit. Through grace this Spirit is poured out into hearts. Thus the soul lives her life of grace through this Holy Spirit. In him she loves the Father with the love of the Son and the Son with the love of the Father… An enlightened faith leads to a living knowledge of this indwelling and to a loving communion with the divine three in pure faith… Once the soul is completely drawn into the divine life in the perfect union of love, it can no longer be concealed from her that it is a tri-personal life and she must establish contact with all three divine Persons.
Saint Teresa Benedicta of the Cross